Heater for automobiles



1,628,671 May 17, J w ET AL HEATER FOR AUTOMOBILES Filed July 27. 1925INVENTORS Jams: J: Jun 0 9 Y 449% ArToRxExi-s Patented May 17; 1927.

UNITED STATES PATENT OFFICE.

JAMES W. KELCH AND JAMES J. SUNDAY, OF DETROIT, MICHIGAN, ASSIGNORS. BYDIRECT AND MESNE ASSIGNMENTS, TO KELCH VENTILATING HEATER COMPANY,

A CORPORATION OF MICHIGAN.

HEATER FOR AUTOMOBILES.

Application filed July 27, 1925. Serial No 46,411.

This invention relates generally to heating apparatus for motor vehiclesand consists of certain'novel features of construction, combinations andarrangements of parts as will be more fully described and particularlypointed out in the appended claims.

lit the accompanying drawing:

l igure 1 is a fraglnentary side elevation of a vehicle with a heaterembodying our invention attached thereto.

' Figure 2 is an enlarged fragmentary vertical longitudinal sectionalview through the heater.

l igure 3 is a sectional view taken on the line 33 of Figure 2.

Figure 1 is a detail side elevation of the front header.

Referring now to the drawing in which like characters of referencedesignate corre' spending parts throughout the several views,

the numeral 1 designates a motor vehicle having an engine exhaustconduit 2 to which the heater 3 embodying our invention is preferablyattached. As shown, the heater 3 is preferably provided with a core 4and an outer shell or casing 5.

In order that the exhaust gases from the motor of the vehicle may beused as the heating medium, the casing or shell 5 1s preferablycylindrical in form and is provided at its opposite ends withfunnel-shaped heads 6 and 7 respectively that are adapted to be sleevedupon aligned portions 8 and 9 respectively of the exhaust conduit Thus,the tubular portions 6' and 7 of their heads constitute inlet and outletports for the exhaust gases. Any suitable means may be employed forconveying air from the atmosphere to the shell 5 and from the shell tothe bodv 11 of the vehicle. As shown, a suitable pipe 12 extendsforwardly from the shell 1 adjacent to the forward end thereof andterminates in a flared portion 13, disposed adjacent to the fan 14 ofthe engine, while a second pipe 15 extends rearwardly from the shell itadjacent to the rear end thereof and connects into a suitable airregister 16 which may be located at any convenient place such as in thefloor of the vehicle bcdv.

in order that the exhaust gases from the engine will be directed throughthe shell 4 without mixing with the air discharged by the conduit 12,the core 4 is preferably provided with two headers 19 and 20respectively and a plurality of spaced straight tubes 21. As shown, theheaders 19 and- 20 are preferably disposed at opposite ends of the shellwhile the tubes 21 extend between these headers and are supportedthereby. lhese tubes may be made of any suitable material such as copperor aluminum and are preferably arranged closer together at their rearends so that the desired concentration of heat maybe obtained. Toprovide a strong and durable construction the tubes 21 are preferablybrazed to the headers 19 and 20 respectively. Thus, the tubes 21 are notlikely to work loose while the heater is in use.

To prevent back pressure on the engine the head 6 and is adapted todeflect the exhaust gases radially into the socket portions 22 which inturn discharge into the tubes 21.

In order that the shell 5 and core 4 of the heater may be easily andquickly assembled or taken apart, the header 19 is preferably clampedbetween the flanges 2i and 25 respectively of the head 6 and shell 5 bymeans of suitable bolts 26, while the header '20 is preferably bolted toan annular plate 27 that is clamped between the flanges 28 and 29respectively of the head 7 and shell 5 by means of the bolts 30. Tofacilitate attachment of the heater to the exhaust pipe 2, the tubularportions 6' and 7 respectively of the heads 6 and T are preferablyclamped into position upon the portions 8 and 9 of the exhaust conduitby means of split collars 31. Thus, with this construction, the heatermay be readily removed from the conduit 2 and taken apart to be cleanedor repaired.

If desired, a suitable baflle 32 may be sleeved upon certain of thetubes 21 of the core approximately midway of the shell 5 for deflectingaround the tubes the air discharged from the conduit 12. Thus, a bettercirculation of the air is obtained within the shell 5. If desired, asuitable cover of ashaust gases passing through the tubes 21 of Iaforesaid for the core and will be subsequently discharged into theconduit 15 leading to the register 16. The'exhaust gases from the en inewill be discharged b the forward portion 8 of the exhaust con uitagainst the conical portion 23 of the header 19 and will be deflectedradially by'said conical portion into the frusto-conical socket portions22 which in turn discharge into the tubes 21, consequently the gaseswill. be substantially uni formly distributed into the tubes 21. As

a result all of the tubes will be heated substantially equal. I i

Inasmuch as the projection 23 is an acute cone it will-be apparent thatit will not retard the flow of gases but will serve efiectively todirect the gases into the frustoconical portions 22. It will also benoted that the inner sides of the irusto-conical portions 22 form adirect continuation of the sides of the projection 23, hence the.exhaust gases will have an uninterrupted passa e romthe projection 23into the tubes 21. s a result back pressure will not be built up on themotor of the vehicle.

While it is believed that from the foregoing description the nature andadvantages of our invention are readil apparent, we desire to have itunderstoo t at we do not. limit ourselves to what is herein shown anddescribed and that such changes ma be resorted to when desired as fallwit in the scope of what is claimed.

What we claim as our invention is: v

1. A heater for motor vehicles including a shell having inlet and outletports for the exhaust gases of the motor, a plurality of tubes extendinglongitudinally of the shell between said inlet and outlet ports, andmeans for directing the exhaust gases into said tubes, said meansincluding a plate havingrfrusto-conical portions connected to the in ctends of said tubes and havin a projection in .ali' ment with the inletport eflecting said gases into said frusto-conical portions.

.' 2. A. heater for motor vehicles including a tubular shell havinglaterally openin inlet and outlet ports for air and having an stantially aligned inlet and outlet ports for the exhaust gases of themotor, a plurality of tubes extending longitudinally of the shellbetween said gas inletand outlet ports, and a transversely extendingheader within the shell having rearwardly extendingsubstanfrusto-conical socket portions secured emlet ends of said tubesand having 11 lo d anaaari means in alignment with the inlet port fordirecting the exhaust gases into said socket portions.

3. A heater for motor vehicles including a shell having laterallyopening inlet and outlet ports for air and having aligned inlet andoutlet orts for the exhaust gases of the motor, a p urality of tubesextending longitudinally of the shell between said gas inlet and outletports, and a header within said shell having means for directing theexhaust gases into said tubes and having additional means-for deflectingtoward the last men tioned means the exhaust gases discharged into saidshell through said. inlet port.

4:. In a heater for motor vehicles, the C0111" bination with a tubularshell, and a core within the shell including a series of tubes extendinglon itudinally of the shell, and a one war y projecting socket portionsconnected to the inlet endsof the tubes and having means intermediatesaid socket ortions for deflecting exhaust gases into sai socketportions.

5. A heater for motor vehicles including a core, and an outer shelltherefor, said core includin spaced headers, and tubes extendinglongitudinally of the shell between said headers, said shell having aninlet at one end for the exhaust gases from the motor of the vehicle,and the adjacent header of said core having a forwardly rojectingconical ortion in all nment with said inlet for de ecting towar saidtubes the exhaust gases discharged into said shell through said inletand having rearwardly projecting socket portions concentric with saidinlet for directing the deflected gases into said tubes, the inner wallsof said socket portions formin a direct continuation of the sides of saiconical portion so that the exhaust gases will have uninterruptedpassage from said projection into said tubes.

6. A heater for motor vehicles including a tubular shell havinglaterally openinginlet and outlet ports, for air, heads at the oppositeends of the shell havin substantially aligned inlet and outlet ports %orthe exhaust gases of the motor, a tube extending longitudinally of theshell between said inlet and outlet ports, and means for directing theexhaust gases into said tube including a transversely extending latewithin the shell having a substantial y frusto-conical ortion connectedto the inlet end of the tu e and having a projection in ali nment withthe inlet port aforesaid for deii ecting said gases into saidfrusto-conical portion.

7 In an air heater for vehicle bodies, the combination with a tubularshell havin r lateral inlet and outlet ports for air, and heads at theopposite ends of said shell provided with substantially aligned inletand outlet ports for exhaust gases, of a core unit with- (fiiece hea erfor the core having reartill llU

ing

tubing including a sheet metal header extending transversely of saidshell and hav; rearwardly extending substantially frusto-conical socketportions secured to the forward ends of said tubing for directing theexhaust gases from said gas inlet port' into said tubing. In testimonywhereof we affix our signa tures.

JAMES W KELCH. JAMES J. SUNDAY.

